A power solution for electronic sensors and wireless IoT

Organic-based optoelectronic technology stands out as an encouraging solution for wireless IoT sensors and electronics. Developed by the Korea Institute of Science and Technology (KIST), could change the way we capture and use energy.

Organic-based optoelectronic technology is gradually being recognized as an energy solution for wireless IoT sensors and electronics. This recognition is largely due to its superior flexibility and lightness compared to traditional silicon-based devices.

Organic photovoltaic cells (VOP) and organic photodetectors (OPD) are important examples in this field. OPVs have the remarkable ability to absorb energy and generate electricity even in low light conditions, while OPDs are capable of capturing images.

Integration of OPV and OPD functionalities

Scientists at the Korea Institute of Science and Technology (KIST) have developed an organic-based optoelectronic device. This device not only integrates the functionalities of the organic photovoltaic cells (OPV) and organic photodetectors (OPD), but is also a pioneer in image visualization in applications that require low-light conditions, thus improving energy efficiency in indoor environments.

By evolving the organic semiconductor layer into a multilayer structure, the research team improved the device’s performance.

Indoors, it achieves an impressive photoelectric conversion efficiency of over 32%, as well as a linear dynamic range of over 130 dB. This significant improvement in contrast ratio, especially in low light conditions, results in a much sharper image than standard devices. silicon traditional, which typically provides a linear dynamic range of 100 dB.

Organic-based optoelectronic technology is attracting more and more attention as an energy-saving and environmentally friendly electronic device for Internet of Things (IoT)-based wireless sensors and low-power indoor electronics. Among them, organic photovoltaic (OPV) and organic photodetector (OPD) effectively utilize unused or weak ambient light to generate electricity and detect light to implement imaging. Organic photovoltaics (OPV) can be used to harvest internal energy, while organic photodetectors (OPD) can be used as cameras, using internal light for imaging as needed.

Successful application of single pixel image detection

The collaborative research team has made additional progress by successfully applying single pixel image detection. This image detection system captures ambient light and turns it into energy electricand uses this energy to acquire images.

Unlike the previous need for specialized cameras in low-light or standard lighting conditions, the newly developed photodetector, featuring a layer of semiconductor multilayer, offers versatile application.

It can function not only as a conventional camera, but also as a decorative element on windows or walls, providing sufficient resolution to discern the shapes and movements of objects.

A versatile technology with many applications

Min-chul Park of KIST highlighted the versatility of this technology, noting: “ Although it primarily functions as an energy harvester, it can also be applied to detect motion and recognize movement patterns in light-free environments. »

He expressed optimism about its potential applications, saying: “ This presents great potential not only for human-computer interaction (HCI) research, but also in various industrial sectors, including smart indoor environments. »

Article: “Self-Powered Sensory Device with Multi-Spectrum Imaging for Smart Indoor Environments” – DOI: 10.1002/adma.202307523


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